Disclosed is a battery charge balancing device which includes: a charge-measuring unit that measures charge of a plurality of batteries storing power through a plurality of power converters connected with a plurality of input power sources; a mode-conversion parameter calculating unit that calculates mode conversion parameters for determining mode conversion such that the power converters operate in a power conversion mode for converting power or in a balancing mode for balancing charge between the batteries; and a control unit that controls power transmission path of the power converters by switching a plurality of switches connected between the power converters and the batteries in accordance with the calculated mode conversion parameters.
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1. A battery charge balancing device, comprising: a charge-measuring unit measuring charge of a plurality of batteries storing power through a plurality of power converters connected with a plurality of input power sources, the batteries comprising at least one of a first, a second, and a third battery, and the power converters comprising at least one of a first, a second, and a third power converter; a mode-conversion parameter calculating unit calculating mode conversion parameters for determining whether to operate a power conversion mode or a balancing mode, the power conversion mode activating the power converters to convert power from the input power sources and to store the converted power to the batteries and the balancing mode balancing charge between the batteries in a manner complementary charging and discharging between the batteries; and a control unit controlling power transmission path of the power converters by switching a plurality of switches connected between the power converters and the batteries in accordance with the calculated mode conversion parameters, wherein the control unit selectively operates to activate the power conversion mode or to activate the balancing mode according to the calculated conversion parameters depending on whether or not the conversion parameters corresponding to the power conversion mode or corresponding to the balancing mode and wherein the selective operation by the control unit associated with whether activating the power conversion mode or the balancing mode further comprises: in response to detection of the calculated mode conversion parameters corresponding to parameters for the power conversion mode, the control unit, by controlling the switches, operates the power converters in the power conversion mode in which the power converters convert power from the input power sources and store the converted power to the batteries; in response to detection of the calculated mode conversion parameters corresponding to parameters for the balancing mode, the control unit, by controlling the switches, operates the power converters in the balancing mode by connecting the first battery of the first power converter with the second power converter and connecting the second battery of the second power converter with the third power converter.
A battery charge balancing device manages charge in a battery system with multiple batteries (at least three: first, second, and third) connected to power converters (at least three: first, second, and third) that receive power from input power sources. The device measures the charge of each battery. It then calculates mode conversion parameters to decide between two modes: power conversion and charge balancing. In power conversion mode, the power converters convert power from the input sources to charge the batteries. In balancing mode, charge is redistributed between the batteries, charging some while discharging others. A control unit uses switches to direct power flow based on the calculated parameters. If parameters indicate power conversion, power converters send power to charge the batteries. If parameters indicate balancing, the first battery connects to the second power converter, and the second battery connects to the third power converter to redistribute charge.
2. The device of claim 1 , wherein the first, the second, and the third battery are connected in series.
The battery charge balancing device described previously, which manages charge in a battery system with multiple batteries (at least three: first, second, and third) connected to power converters (at least three: first, second, and third) that receive power from input power sources by measuring charge, calculating mode conversion parameters to decide between power conversion mode (converting input power to charge batteries) and charge balancing mode (redistributing charge), and uses a control unit with switches to direct power flow, has its first, second, and third batteries connected in series.
3. The device of claim 1 , wherein power from the input power source is cut off in response to detection of the balancing mode of the power converters.
The battery charge balancing device described previously, which manages charge in a battery system with multiple batteries (at least three: first, second, and third) connected to power converters (at least three: first, second, and third) that receive power from input power sources by measuring charge, calculating mode conversion parameters to decide between power conversion mode (converting input power to charge batteries) and charge balancing mode (redistributing charge), and uses a control unit with switches to direct power flow, cuts off power from the input power source when the power converters switch to the balancing mode.
4. The device of claim 1 , wherein the mode-conversion parameter calculating unit calculates the mode conversion parameters on the basis of at least one of a charge difference between the batteries, mode conversion time of the power converters, and voltage, current, temperature, and frequency response of the batteries.
In the battery charge balancing device described previously, which manages charge in a battery system with multiple batteries (at least three: first, second, and third) connected to power converters (at least three: first, second, and third) that receive power from input power sources by measuring charge, calculating mode conversion parameters to decide between power conversion mode (converting input power to charge batteries) and charge balancing mode (redistributing charge), and uses a control unit with switches to direct power flow, the mode-conversion parameter calculating unit determines whether to use the power conversion mode or balancing mode based on factors like charge differences between the batteries, the switching time between modes, and voltage, current, temperature, and frequency characteristics of the batteries.
5. The device of claim 1 , wherein the control unit charges or discharges the first battery or the second battery by controlling a first closed loop formed by connecting the first battery with the second power converter and a second closed loop formed between the second power converter and the second battery.
In the battery charge balancing device described previously, which manages charge in a battery system with multiple batteries (at least three: first, second, and third) connected to power converters (at least three: first, second, and third) that receive power from input power sources by measuring charge, calculating mode conversion parameters to decide between power conversion mode (converting input power to charge batteries) and charge balancing mode (redistributing charge), and uses a control unit with switches to direct power flow, the control unit balances charge by either charging or discharging the first or second battery. This is done by controlling a closed loop circuit formed between the first battery and the second power converter, and another closed loop circuit between the second power converter and the second battery.
6. The device of claim 1 , wherein the control unit charges or discharges the second battery or the third battery by controlling a third closed loop formed by connecting the second battery with the third power converter and a fourth closed loop formed between the third power converter and the third battery.
In the battery charge balancing device described previously, which manages charge in a battery system with multiple batteries (at least three: first, second, and third) connected to power converters (at least three: first, second, and third) that receive power from input power sources by measuring charge, calculating mode conversion parameters to decide between power conversion mode (converting input power to charge batteries) and charge balancing mode (redistributing charge), and uses a control unit with switches to direct power flow, the control unit balances charge by either charging or discharging the second or third battery. This is done by controlling a closed loop circuit formed between the second battery and the third power converter, and another closed loop circuit between the third power converter and the third battery.
7. The device of claim 1 , wherein at least one of the first closed loop, the second closed loop, the third closed loop, and the fourth closed loop is controlled in a duty ratio control method or a frequency control method of a switch.
The battery charge balancing device described previously, which manages charge in a battery system with multiple batteries (at least three: first, second, and third) connected to power converters (at least three: first, second, and third) that receive power from input power sources by measuring charge, calculating mode conversion parameters to decide between power conversion mode (converting input power to charge batteries) and charge balancing mode (redistributing charge), and uses a control unit with switches to direct power flow, balances charge using closed loop circuits between batteries and power converters, and controls at least one of these loops with either a duty ratio control method or a frequency control method applied to a switch within the loop. The closed loops are: first battery and the second power converter, the second power converter and the second battery, the second battery and the third power converter, and the third power converter and the third battery.
8. The device of claim 5 , wherein at least one of the first closed loop, the second closed loop, the third closed loop, and the fourth closed loop is controlled in a duty ratio control method or a frequency control method of a switch.
A device for managing fluid flow in a system with multiple closed loops, where each loop is controlled to regulate fluid distribution. The device includes at least four closed loops, each containing a switch that can be operated in either a duty ratio control method or a frequency control method to adjust the flow rate. The duty ratio control method varies the on/off ratio of the switch to control the average flow, while the frequency control method adjusts the switching frequency to regulate flow. The device ensures precise fluid management by independently or collectively controlling the loops, allowing for dynamic adjustments based on system demands. This approach improves efficiency and responsiveness in fluid distribution systems, such as cooling systems, hydraulic circuits, or chemical processing applications. The control methods enable fine-tuned regulation of flow rates, ensuring optimal performance and energy efficiency. The device is particularly useful in applications requiring precise fluid control, such as thermal management in electronics or industrial processes.
9. The device of claim 6 , wherein at least one of the first closed loop, the second closed loop, the third closed loop, and the fourth closed loop is controlled in a duty ratio control method or a frequency control method of a switch.
In the battery charge balancing device described previously where the control unit charges or discharges the second battery or the third battery by controlling a third closed loop formed by connecting the second battery with the third power converter and a fourth closed loop formed between the third power converter and the third battery, at least one of these loops or other balancing loops (first loop is between the first battery and the second power converter, and the second loop is between the second power converter and the second battery) is controlled via a duty ratio or frequency control method applied to a switch in that loop.
10. The device of claim 1 , wherein the first power converter and the second power converter, or the second power converter and the third power converter are sequentially and repeatedly formed.
In the battery charge balancing device described previously, which manages charge in a battery system with multiple batteries (at least three: first, second, and third) connected to power converters (at least three: first, second, and third) that receive power from input power sources by measuring charge, calculating mode conversion parameters to decide between power conversion mode (converting input power to charge batteries) and charge balancing mode (redistributing charge), and uses a control unit with switches to direct power flow, the first power converter and the second power converter, or the second power converter and the third power converter connections are formed sequentially and repeatedly.
11. The device of claim 5 , wherein the first power converter and the second power converter, or the second power converter and the third power converter are sequentially and repeatedly formed.
In the battery charge balancing device described previously where the control unit charges or discharges the first battery or the second battery by controlling a first closed loop formed by connecting the first battery with the second power converter and a second closed loop formed between the second power converter and the second battery, the first power converter and the second power converter, or the second power converter and the third power converter connections are formed sequentially and repeatedly.
12. The device of claim 6 , wherein the first power converter and the second power converter, or the second power converter and the third power converter are sequentially and repeatedly formed.
In the battery charge balancing device described previously where the control unit charges or discharges the second battery or the third battery by controlling a third closed loop formed by connecting the second battery with the third power converter and a fourth closed loop formed between the third power converter and the third battery, the first power converter and the second power converter, or the second power converter and the third power converter connections are formed sequentially and repeatedly.
13. A battery charge balancing system comprising: an input power source unit including a plurality of input power sources; a power converting unit including a plurality of power converters converting power from the input power sources, the power converters comprising at least one of a first, a second, and a third power converter; a power-storing unit including a plurality of batteries storing converted power; a switching unit including a plurality of switches switching the connections between the power converters and the power-storing units; a battery charge balancing device including a charge-measuring unit configured to measure charge of the batteries comprising at least one of a first, a second, and a third battery; a mode-conversion parameter calculating unit configured to calculate mode conversion parameters for determining whether to operate a power conversion mode or a balancing mode, the power conversion mode activating the power converters to convert power from the input power sources and to store the converted power to the batteries and the balancing mode balancing charge between the batteries in a manner complementary charging and discharging between the batteries; a control unit configured to control a power transmission path of the power converters by switching the switching unit in accordance with the calculated mode conversion parameters; and a DC-link connected in parallel at both ends of the batteries connected in series, wherein the control unit selectively operates to activate the power conversion mode or to activate the balancing mode according to the calculated conversion parameters depending on whether or not the conversion parameters corresponding to the power conversion mode or corresponding to the balancing mode, and wherein the selective operation by the control unit associated with whether activating the power conversion mode or the balancing mode further comprises: in response to detection of the calculated mode conversion parameters corresponding to parameters for the power conversion mode, the control unit, by controlling the switches, operates the power converters in the power conversion mode in which the power converters convert power from the input power sources and store the converted power to the batteries; in response to detection of the calculated mode conversion parameters corresponding to parameters for the balancing mode, the control unit, by controlling the switches, operates the power converters in the balancing mode by connecting the first battery of the first power converter with the second power converter and connecting the second battery of the second power converter with the third power converter.
A battery charge balancing system comprises an input power source unit including a plurality of input power sources, a power converting unit including a plurality of power converters (at least three: first, second, and third) converting power from the input power sources, a power-storing unit including a plurality of batteries (at least three: first, second, and third) storing converted power, a switching unit including a plurality of switches switching the connections between the power converters and the power-storing units, and a battery charge balancing device. The balancing device measures the charge of the batteries and calculates mode conversion parameters to decide between power conversion (converting input power to charge the batteries) and balancing mode (redistributing charge). A control unit controls the switches to manage power flow based on these parameters. A DC-link is connected in parallel at both ends of the batteries connected in series. If parameters indicate power conversion, power converters send power to charge the batteries. If parameters indicate balancing, the first battery connects to the second power converter, and the second battery connects to the third power converter to redistribute charge.
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January 25, 2013
August 1, 2017
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